How to maximize the life of your cold saw blades?
No matter how much care you put into your coldsaw, eventually its blades will need resharpened. However, there’re things you can do to maximise the life of your blades, cutting costs in both time and money.
TPI stands for Teeth Per Inch. TPI (teeth per inch) is a critical consideration when cutting with a coldsaw. The proper blade for an application depends on many factors. These include the hardness of the material, the size of the material, the wall thickness, and more.
Generally, it is best to aim for finer tooth count for harder materials. Similarly, you would be looking for a coarser toothed blade with a lower TPI for softer materials such as aluminium. In part, this is to avoid the material clogging up the blade’s tooth gullets. For this same reason, when cutting a solid section, a fine-tooth pitch can also lead to exceeding gullet capacity. When cutting thin walled material, there should be at least three teeth touching the material at any one time.
While it sounds daunting at first, don’t pull too hard, but don’t pull too lightly! Cutting with a manual descent coldsaw requires the operator to consider their down feed pressure. Too much pressure can overload the motor, and break teeth. Too little pressure can rub against the metal rather than bite, and dull blades faster. However, with short experience the operator will easily be able to feel when the blade is doing the heavy lifting.
Thankfully, all DIMAKIN coldsaws come with integral, in-built flood coolant systems. While the coolant pumps run separately and can be turned off if required, it is not recommended when cutting metals. This flood coolant acts to both lubricate and cool the part being cut, and the blade’s teeth during operation. In turn, this extends the life of your blade and the quality of your cuts exponentially.
It may seem trivial, but two common mistakes made by busy operators are as follows:
While the entry level machines in the DIMAKIN range are ideal for almost all fabrication applications, one upgrade is available. With the CS-350-DM, a key feature improvement is the inverter driven variable speed dial with digital readout. With this upgrade, operators can reduce or increase the speed dependent on the material being cut. Slower for harder materials such as stainless. Medium speeds for medium materials such as mild. Faster for softer materials such as aluminium. With the CS-350-DM, the operator is able to fine tune the speeds between 24 and 120 RPM. Perfect for extending the life of a coldsaw blade that little bit more, and improving the quality of your workshop fabrication.
While it is hard to say how long a coldsaw blade will last, if used well, a blade could cut 800 to 1000 times before needing sharpened. However, this is highly dependent on many factors. Factors such as the properties of material being cut, all the way to human factors such as descent pressure. Despite this, one of the main benefits to a coldsaw is that blades can easily and relatively inexpensively be resharpened.
Over time you will easily be able to tell when it is time for a blade to be resharpened. Among these symptoms are:
Whether you’re changing to an alternative TPI (teeth per inch), or your blade has become dull and requires resharpening, with a little bit of practice you will be able to change out a blade in under 60 seconds!